Mining-machine



(No Model.)

I'. N. SLADB. MINING MACHINE.

No. 493.659. Patented Mar. 21,1893.

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FRANK N. SLADE, OF COLUMBUS, OHIO.

MINING-MACHINE.

SPECIFICATION forming part of Letters Patent N o. 493,659, dated March21, 1893. Application'iiled April l1, 1892. Serial No. 428,710. (Nomodel.)

To @ZZ whom it may concern.'

Be it known thatI, FRANK N. SLADE, acitizen of the United States,residing at Columbus, in the county of Franklin and State of Ohio, haveinvented a certain new and useful Improvement in Mining-Machines, ofwhich the following is a specification.

My invention relates to holding devices for mining machines and theobjects of my invention are, to provide that class of mining machineswherein are employed chain cutters, with superior means for holding theframework of the machine against lateral movement or displacement duringthe cutting op` eration; to so construct and utilize said holding deviceas to obviate the necessity of forming a separate holding cut or kerf inthe coal wall; to provide said holding device in asimple, effective andinexpensive manner and to produce other improvements which will be morespecifically pointed out hereinafter. These objects I accomplish in themanner illustrated in the accompanying drawings,in which,

Figure l is a plan view of a portion of a mining machine showinga partof the forward end of the sliding frame and showing my improved holdingdevice in connection therewith. Fig. 2 is a detail face view of one ofthe holding plates. Fig. 3 is a plan view showing the upper holdingplate removed and Fig. 4 is a side elevation of the holding plates andcutting chain.

Similar letters refer to similar out the several views.

a represents the upper plate of the forward cross-piece of the slidingframe and b represents the lower plate thereof. The plates a and b areas is usual in this class of machines, connected near their ends by avertical pin or shaft c, upon which is mounted between said plates, asprocket-wheel d. As shown in the drawings, those portions of the upperand lower face of this sprocket-wheel which do not embrace the teeth dthereof are as shown at d2, thickened or elevated resulting in theformation of shoulders d3 at the bases of said teeth. To these elevatedportions d2 of the sprocket wheel, are riveted or otherwise secured tothe upper and lower holding plates e, e. Each of these plates is in theparts throughform of a disk segment which occupies the greater portionof the area of a complete disk. rihat side of each of the plates c, ewhich is cut away has its edge or periphery at opposite points beyondthe center of the larger circle described, curved inward a shortdistance to form rounded shouldersf. The inner ends of these shouldersfare connected by the ends of a shorter arc of which lthe shaft openingc2 is the center. The substantially cam-shaped body thus formed producesas shown, the rounded lobes f', f2. The arc of the circle described byeach of the smaller lobes f2 of the plates e, e conforms as shown, tothe curve of the outer corners g of the frame plates c, b, the curvededges of said plate corners, g and lobes f2 being adapted to be broughtinto vertical alignment, as shown. In securing the plates e e to thebody of the sprocket wheel, said plates are so arranged that the smallerlobe of the plate e is covered by the larger lobe of the upper plate e,said plates thus forming conjointly, when viewed in plan, a completecircle in the arc of the greater lobe f' z' represents a cutting anddriving chain which may be of any desired form of tool-carrying chain.Of this chain 2 represents the tool-holding link and i3 the connectinglinks between which' the lugs or teeth of the sprocket-Wheel engagen 7crepresents the cutting tools, the shanks of which are adjustablysupported in the toolholding links 2 from which said cutting toolsproject. The outer and sharpened ends of these tools project as shown,slightly beyond the arc described by the larger plate lebe f. As isusual in this class of cutting chains, the cutting tools travel in thefollowing order, towit: An upwardly inclined intermediate tool, a longupwardly inclined tool, a short intermediate downwardly inclined tooland a long downwardly inclined tool.

Motion having been imparted to the chain in the usual or well-knownmanner and a forward feeding motion being imparted to the sliding frameof which the plates cab, are a part, the operation of my holding deviceis as follows: For the sake of illustration, we will assume that the twocutting tools exposed in Fig. l of the drawings, are upwardly inclinedtools and that the edge of the lobe f of the lower hold- Which thecutting tools are moving` ing plate e', is Within that portion of thekert of the coal Wall previously cut by the downwardly inclined cutters.The parts being in these positions, it will readily be seen that thatportion of the kerf produced by the upwardly inclined cutting toolsshown in Fig. 1 of the drawings, Will be entered by the larger lobe f ofthe plate e and in this manner the larger lobes of the upper and lowerplates e t and e Will successively enter the kerf portions producedrespectively by the downwardly and upwardly inclined cutting tools. Fromthe construction and operation above described, it will readily be seenthat the positions of the rotating plates c and e Within the kert', aresuch as to bring said plates into contact with the coal at the end ofthe kerf and thus prevent anylateral movementof the machine Which mightotherwise be produced by the resistance of the coal to the engagingtools. lt will be observed that this method of assuring thefposition ofthe machine is exceedingly simple, and that it affords at all times alateral resistance i-n the direction opposite that in It Will also beobserved that the construction herein described, obviates the necessityof forming a second or holding kerf in the coal Wall and that the partsare arranged and formed in a durable and reliable manner.

Having now fully described my invention,

what I' claim, and desire to secure by Letters Patent, is- Y l. In amining machine, the combination with the sliding frame, a sprocket wheeljournaled therein and a cutter chain running on said Wheel, of a holdingdevice projecting from the machine or a part thereof, and engagingwiththe kerf cut by said cutting chain, substantially as specied.

2. n a mining machine, the combination with the sliding frame, asprocket Wheel journaled therein, and a cutter chain traveling on saidsprocketwheel, of holding plates secured to and projecting from thefaces of said sprocket Wheel, substantially as and for the purposespecified.

3. In a mining machine, the combination With the slid-ing frame,sprocket Wheels journaled therein, and tool-holding chains carried onsaid sprockets, of the holding plates e, c' secured respectively to theupper and lower faces of said sprocket Wheel, said plates being formedwith large and small lobes as described, and adapted to enter the kerfsformed by the cutting tools ot' said chain, substantially as and for thepurpose specified.

FRANK N. SLADE. In presence of- C. C. SHEPHERD, SCOTT A. WEBB.

